neuroscience-oriented distribution - popcon integration

The NeuroDebian project integrates and maintains a variety of software
projects within Debian that are useful for neuroscience (such as AFNI,
FSL, PsychoPy, etc.) or generic computation (such as HTCondor,
pandas, etc.).

This package is a complement to the generic popularity-contest
package to enable anonymous submission of usage statistics to
NeuroDebian in addition to the popcon submissions to the underlying
distribution (either Debian or Ubuntu) popcon server.

Participating in popcon is important for the following reasons:

* Popular packages receive more attention from developers; bugs are
fixed faster and updates are provided quicker.
* It ensures that support is not dropped for a previous release of
Debian or Ubuntu while there are active users.
* User statistics may be useful for upstream research software
developers seeking funding for continued development.

This requires that popcon is activated for the underlying distribution
(Debian or Ubuntu), which can be achieved by running
"dpkg-reconfigure popularity-contest" as root.